john kerry said the u.s. could impose sanctions to condemn putin's actions. >> russia will lose, the russian people will lose. you will lose all of the glow that came out of the olympics. a sochit going to have g-8. you may not even remain in the g8 if this continues. he may find himself with asset freezes on russian business, american business may pull back. there may be of further tumble money. >> moscow's main stock index tumbled 9%. we will have more on ukraine after the headlines. nearly 400 opponents of the keystone xl oil pipeline were arrested sunday in front of the white house, marking what could be the largest youth sit in on the environment in a generation. >> we are here to march to the white house and form one of the largest accessible disobedience for climate ever. hundreds of young people all came here from all over the country, 42 states, to show president obama the keystone xl is not ok and not in our national interest. than 80nts for more colleges rallied at georgetown university and then ma